Run the OptiFine installer. Close the Minecraft Launcher and Minecraft, so no game processes are running. Right-click the downloaded .jar file → choose Open with Java (or “Java™ Platform SE binary”).
Java Edition," you'll first need to download a free program called OptiFine.
Mojang's new Minecraft Java 1.21.9 update is out, and players can enhance their experience with OptiFine. This guide details how to safely download and install OptiFine, even if a stable 1.21.9 ...